/* Copyright (c) 2020 XEPIC Corporation Limited */
/*
 * Copyright (c) 1999-2014 Stephen Williams (steve@icarus.com)
 * Copyright (c) 2000 Stephan Boettcher <stephan@nevis.columbia.edu>
 *
 *    This source code is free software; you can redistribute it
 *    and/or modify it in source code form under the terms of the GNU
 *    General Public License as published by the Free Software
 *    Foundation; either version 2 of the License, or (at your option)
 *    any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 * USA.
 */

#include <assert.h>
#include <string.h>

#include "sys_priv.h"

static PLI_INT32 sys_deposit_compiletf(ICARUS_VPI_CONST PLI_BYTE8 *name) {
  vpiHandle callh = vpi_handle(vpiSysTfCall, 0);
  vpiHandle argv = vpi_iterate(vpiArgument, callh);
  vpiHandle target, value;

  /* Check that there are arguments. */
  if (argv == 0) {
    vpi_printf("ERROR: %s:%d: ", vpi_get_str(vpiFile, callh),
               (int)vpi_get(vpiLineNo, callh));
    vpi_printf("%s requires two arguments.\n", name);
    vpi_control(vpiFinish, 1);
    return 0;
  }

  /* Check that there are at least two arguments. */
  target = vpi_scan(argv); /* This should never be zero. */
  value = vpi_scan(argv);
  if (value == 0) {
    vpi_printf("ERROR: %s:%d: ", vpi_get_str(vpiFile, callh),
               (int)vpi_get(vpiLineNo, callh));
    vpi_printf("%s requires two arguments.\n", name);
    vpi_control(vpiFinish, 1);
    return 0;
  }

  assert(target);

  /* Check the targets type. It must be a net or a register. */
  switch (vpi_get(vpiType, target)) {
    case vpiNet:
    case vpiReg:
      break;
    default:
      vpi_printf("ERROR: %s:%d: ", vpi_get_str(vpiFile, callh),
                 (int)vpi_get(vpiLineNo, callh));
      vpi_printf("invalid target type (%s) for %s.\n",
                 vpi_get_str(vpiType, target), name);
      vpi_control(vpiFinish, 1);
  }

  /* Check that there is at most two arguments. */
  check_for_extra_args(argv, callh, name, "two arguments", 0);

  return 0;
}

static PLI_INT32 sys_deposit_calltf(ICARUS_VPI_CONST PLI_BYTE8 *name) {
  vpiHandle callh, argv, target, value;
  s_vpi_value val;

  (void)name; /* Parameter is not used. */

  callh = vpi_handle(vpiSysTfCall, 0);
  argv = vpi_iterate(vpiArgument, callh);
  target = vpi_scan(argv);
  assert(target);
  value = vpi_scan(argv);
  assert(value);

  val.format = vpiIntVal;
  vpi_get_value(value, &val);

  vpi_put_value(target, &val, 0, vpiNoDelay);

  vpi_free_object(argv);
  return 0;
}

void sys_deposit_register(void) {
  s_vpi_systf_data tf_data;
  vpiHandle res;

  tf_data.type = vpiSysTask;
  tf_data.tfname = "$deposit";
  tf_data.calltf = sys_deposit_calltf;
  tf_data.compiletf = sys_deposit_compiletf;
  tf_data.sizetf = 0;
  tf_data.user_data = "$deposit";
  res = vpi_register_systf(&tf_data);
  vpip_make_systf_system_defined(res);
}
